Electric drive housing assembly

Abstract

The present invention discloses an electric drive housing assembly, comprising an electric control housing, a motor housing, and a reducer housing. The two motor housings are symmetrically arranged on either side of the reducer housing, and the electric control housing is disposed above the reducer housing. The motor housing comprises a first end cover, a main housing, and a second end cover. The main housing is cylindrical, with the first end cover disposed on one side of the main housing and the second end cover located on the other side of the main housing and integrally formed therewith. The two second end covers are disposed on either side of the reducer housing, respectively. The second end cover has a reducer bearing mounting position on one side of the reducer housing and a motor bearing mounting position on the other side of the main housing. The second end cover has an output shaft hole in the area extending beyond the main housing. The present invention has the advantages of a compact structure, ease of maintenance, and excellent heat dissipation performance.

Description

Technical Field

[0001] The present invention relates to the technical field of electric drive systems, and in particular to an electric drive housing assembly. Background Art

[0002] In the new energy vehicle sector, the electric drive housing assembly, a key component that supports and mounts electric drive components, has a significant impact on the vehicle's power, energy efficiency, and NVH (noise, vibration, and harshness) performance. High integration of electric drive housing assemblies is a key trend in current technological development. This integrated design primarily integrates multiple key components, such as the motor, controller, and reducer, into a single housing, creating a "three-in-one" or even more highly integrated electric drive system. This design not only reduces system weight and size, but also significantly improves the power density and overall durability of the electric drive system. Furthermore, this highly integrated design reduces manufacturing costs, improves production efficiency, and facilitates assembly.

[0003] Although the high degree of integration of the electric drive housing assembly brings many advantages, it also has some disadvantages:

[0004] 1. Heat dissipation: Highly integrated designs bring components closer together, resulting in more concentrated heat. This requires the system to possess stronger heat dissipation capabilities to maintain a normal internal temperature. However, traditional cooling systems may not meet this requirement, necessitating the use of more advanced heat dissipation technologies.

[0005] 2. Increased Maintenance Difficulty: With a highly integrated design, if a component within the system fails, the entire module may need to be dismantled for repair. This not only increases the difficulty and time cost of repair, but may also affect the overall performance of the system. Furthermore, the highly integrated design makes the internal structure of the system more complex, placing higher demands on the professional skills of maintenance personnel.

[0006] Therefore, it is necessary to design an electric drive housing assembly with compact structure, easy maintenance and excellent heat dissipation performance. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an electric drive housing assembly that is compact in structure, easy to maintain, and has excellent heat dissipation performance.

[0008] The technical solution of the present invention provides an electric drive housing assembly, including an electric control housing, a motor housing and a reducer housing, wherein the two motor housings are symmetrically arranged on both sides of the reducer housing, and the electric control housing is arranged above the reducer housing. The motor housing includes a first end cover, a main housing and a second end cover. The main housing is cylindrical, the first end cover is provided on one side of the main housing, and the second end cover is located on the other side of the main housing and is integrally formed with the main housing. The two second end covers are respectively provided on both sides of the reducer housing;

[0009] A reducer bearing mounting position is provided on one side of the second end cover facing the reducer housing, and a motor bearing mounting position is provided on the other side facing the main housing. An output shaft hole is provided on the area of the second end cover extending beyond the main housing.

[0010] Furthermore, a wiring cavity is provided in the reducer housing, an electric control box opening is provided on the top surface of the wiring cavity, and a motor box opening is provided on each of the two side surfaces of the wiring cavity;

[0011] The bottom surface of the electric control housing is provided with an electric control wiring port, and the electric control wiring port is connected to the opening of the electric control box;

[0012] The second end cover is provided with a motor connection port, the motor connection port leads to the interior of the main shell, and the motor connection port is connected to the motor box opening.

[0013] Furthermore, the reducer housing includes an input shaft area, an intermediate shaft area and an output shaft area;

[0014] The connection chamber is arranged above the input shaft region of the reducer housing.

[0015] Furthermore, the electric control box opening and the bottom surface of the electric control housing are sealed by sealant.

[0016] Furthermore, the motor box opening and the motor wiring port are sealed by sealant.

[0017] Furthermore, the reducer housing includes a first cavity and a second cavity, and the first cavity and the second cavity respectively correspond to one of the motor housings.

[0018] Furthermore, it also includes an electronically controlled cooling circuit and a motor cooling circuit, the electronically controlled cooling circuit includes a first electronically controlled cooling circuit and a second electronically controlled cooling circuit, the motor cooling circuit includes a first motor cooling circuit and a second motor cooling circuit, the first electronically controlled cooling circuit and the second electronically controlled cooling circuit are both arranged in the electronically controlled housing, the first motor cooling circuit and the second motor cooling circuit are respectively arranged in the two motor housings, the first electronically controlled cooling circuit is connected to the first motor cooling circuit, and the second electronically controlled cooling circuit is connected to the second motor cooling circuit.

[0019] Furthermore, it also includes a cooling main pipeline, which is arranged in the electronic control housing and is connected to the inlets of the first electronic control cooling circuit and the second electronic control cooling circuit respectively. The cooling main pipeline includes an access pipe and a branch pipe. The access pipe is used to connect to an external cooling source. The access pipe is connected to the branch pipe, and the branch pipe is connected to the inlets of the first electronic control cooling circuit and the second electronic control cooling circuit respectively.

[0020] Furthermore, the electric control housing includes a cover plate and a bottom shell;

[0021] The first electrically controlled cooling circuit and the second electrically controlled cooling circuit both include an input pipe, a cooling trough, and an output pipe. The two input pipes are connected to the branch pipe. The input pipe and the output pipe are formed inside the bottom plate of the bottom shell. The cooling trough is opened on the inner side surface of the bottom plate, and the two cooling troughs are arranged side by side.

[0022] Furthermore, the first motor cooling circuit and the second motor cooling circuit both include a liquid inlet, a spiral cooling channel and a liquid outlet, the liquid inlet is connected to the output pipe, the spiral cooling channel is arranged inside the main shell, and the liquid inlet and the liquid outlet are arranged on the outer wall of the main shell and are connected to the spiral cooling channel.

[0023] The above technical solution has the following beneficial effects:

[0024] In the present invention, the electric control housing is separately provided for easy maintenance; at the same time, the motor housing and the reducer housing are integrated in the same axial direction, and the motor housing and the reducer housing share the second end cover, so that the axial structure is more compact and occupies less space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings:

[0026] Figure 1 The electric drive housing assembly in one embodiment of the present invention Figure 1 ;

[0027] Figure 2 This is a decomposition of the electric drive housing assembly in one embodiment of the present invention. Figure 1 ;

[0028] Figure 3 is an exploded view of a reducer housing and a motor housing in one embodiment of the present invention;

[0029] Figure 4 is an exploded view of an electric control housing according to one embodiment of the present invention;

[0030] Figure 5 This is an exploded view of the maintenance cover and the reducer housing in one embodiment of the present invention;

[0031] Figure 6 is a cross-sectional view of a cover plate according to an embodiment of the present invention;

[0032] Figure 7 The electric drive housing assembly in one embodiment of the present invention Figure 2 ;

[0033] Figure 8 The electric drive housing assembly in one embodiment of the present invention Figure 3 ;

[0034] Figure 9 This is a decomposition of the electric drive housing assembly in one embodiment of the present invention. Figure 2 ;

[0035] Figure 10 is a schematic diagram of a motor housing and a reducer housing in one embodiment of the present invention;

[0036] Figure 11 is a schematic diagram of an electric control housing in one embodiment of the present invention;

[0037] Figure 12 This is a schematic diagram of the internal structure of the electric control housing in one embodiment of the present invention;

[0038] Figure 13 Schematic diagram of an electronically controlled cooling circuit and a motor cooling circuit in one embodiment of the present invention.

[0039] Reference table of accompanying symbols:

[0040] Electronic control housing 1: cover 11, bottom shell 12, hexagonal reinforcement rib 13, electronic control wiring port 14, slash reinforcement rib 15, metal layer 111, damping material layer 112, first mounting hole 121, second mounting hole 122;

[0041] Motor housing 2: first end cover 21, main housing 22, second end cover 23, first mounting post 221, motor connection port 231, reducer bearing mounting position 232, output shaft hole 233;

[0042] Electronically controlled cooling circuit 3: input pipe 31, cooling tank 32, output pipe 33;

[0043] Motor cooling circuit 4: liquid inlet 41, spiral cooling channel 42, liquid outlet 43;

[0044] Cooling main pipeline 5: access pipe 51, branch pipe 52;

[0045] Reducer housing 6: wiring cavity 61, electric control box opening 611, motor box opening 612, maintenance port 613, maintenance cover 62, second mounting column 63;

[0046] Motor 10 and power module 20 . DETAILED DESCRIPTION

[0047] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0048] It is easy to understand that according to the technical solution of the present invention, a variety of structural modes and implementation modes can be replaced with each other by those skilled in the art without changing the essential spirit of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the invention.

[0049] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the structure shown in the drawings. They are relative concepts and may vary depending on the location and usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0050] In some embodiments of the present invention, Figure 1-Figure 2 As shown, the electric drive housing assembly includes an electric control housing 1, a motor housing 2 and a reducer housing 6. The two motor housings 2 are symmetrically arranged on both sides of the reducer housing 6, and the electric control housing 1 is arranged above the reducer housing 6. The motor housing 2 includes a first end cover 21, a main housing 22 and a second end cover 23. The main housing 22 is cylindrical. The first end cover 21 is provided on one side of the main housing 22, and the second end cover 23 is located on the other side of the main housing 22 and is integrally formed with the main housing 22. The two second end covers 23 are respectively provided on both sides of the reducer housing 6.

[0051] A reducer bearing mounting position is provided on one side of the second end cover 23 facing the reducer housing 6 , and a motor bearing mounting position is provided on the other side facing the main housing 22 . An output shaft hole is provided in the area of the second end cover 23 extending beyond the main housing 22 .

[0052] Specifically, Figure 1As shown, the electric control housing 1 is arranged directly above the reducer housing 6 and is also located above the two motor housings 2. The electric control housing 1 is arranged independently, which facilitates the maintenance of the components installed in the electric control housing 1.

[0053] like Figure 2 As shown, the reducer housing 6 and the two motor housings 2 are coaxially connected. The motor housing 2 includes a first end cover 21, a main housing 22 and a second end cover 23. The first end cover 21 is located on the outside of the main housing 22, and the second end cover 23 is located between the main housing 22 and the reducer housing 6. The second end cover 23 is integrally formed with the main housing 22, thereby increasing the integration of the housing.

[0054] like Figure 2 As shown, the motor 10 is installed in the cavity between the first end cover 21 and the main housing 22, and the reducer (not shown) is installed in the cavity between the second end cover 23 and the reducer housing 6. The second end cover 23 is both the end cover of the motor housing 2 and, when connected to the reducer housing 6, also serves as the end cover of the reducer housing 6. This allows the motor housing 2 and the reducer housing 6 to be shared, which helps to reduce the axial dimension, making the structure more compact and taking up less space. At the same time, it is also convenient for maintenance. When the motor needs to be repaired, the first end cover 21 can be disassembled; when the reducer needs to be repaired, the second end cover 23 can be separated from the reducer housing 6.

[0055] Therefore, the electric drive housing assembly in this embodiment has the advantages of compact structure and small space occupation, and is easy to maintain.

[0056] Further, if Figure 3 As shown, the second end cover 23 is provided with a reducer bearing mounting position 232 on one side facing the reducer housing 6, and a motor bearing mounting position (not shown) is provided on the other side facing the main housing 22. The area of the second end cover 23 extending beyond the main housing 22 is provided with an output shaft hole 233.

[0057] Among them, the reducer bearing mounting position 232 is used to install the bearings of the input shaft and intermediate shaft of the reducer, the motor bearing mounting position is used to install the bearings of the motor, and the output shaft hole 233 is used to install the bearing of the output shaft. After the output shaft extends from the output shaft hole 233, it is connected to the external wheel axle.

[0058] The reducer housing 6 is also provided with corresponding mounting positions for the bearings of the input shaft, intermediate shaft and output shaft.

[0059] Further, if Figure 3 As shown, a wiring cavity 61 is provided in the reducer housing 6. An electric control closing opening 611 is provided on the top surface of the wiring cavity 61, and a motor closing opening 612 is provided on each side surface of the wiring cavity 61.

[0060] like Figure 4As shown, the bottom surface of the electric control housing 1 is provided with an electric control wiring port 14, which is connected to the electric control box opening 611;

[0061] like Figure 3 As shown, a motor connection port 231 is provided on the second end cover 23 , the motor connection port 231 leads to the interior of the main housing 22 , and the motor connection port 231 is connected to the motor closing opening 612 .

[0062] Specifically, Figure 4 As shown, an electric control wiring port 14 is provided on the bottom surface of the bottom shell 12 of the electric control housing 1 , and the wiring harness of the motor controller is centrally led out from the electric control wiring port 14 .

[0063] like Figure 3 As shown, an electric control box opening 611 is provided on the top surface of the wiring cavity 61 . After the wiring harness of the motor controller is led out from the electric control wiring port 14 , it enters the wiring cavity 61 through the electric control box opening 611 .

[0064] like Figure 3 As shown, the left and right sides of the wiring cavity 61 each have a motor box opening 612, and the second end cover 23 is provided with a motor wiring port 231. Figure 2 As shown, the wiring harness of the motor 10 passes through the motor wiring port 231 and then enters the wiring cavity 61 through the motor housing opening 612. Therefore, the wiring harness of the motor 10 and the wiring harness of the motor controller are connected in the wiring cavity 61. The provision of the wiring cavity 61 facilitates the centralized connection of the wiring harnesses, facilitates inspection and maintenance, and increases the integration level.

[0065] Preferably, if Figure 3 As shown, the reducer housing 6 includes an input shaft region, an intermediate shaft region, and an output shaft region; a wiring cavity 61 is provided above the input shaft region of the reducer housing 6. The wiring cavity 61 utilizes the space above the input shaft region of the reducer housing 6, which is located between the two motor housings 2 and below the electronic control housing 1. This effectively utilizes this narrow space and makes the structure more compact.

[0066] Further, if Figure 1 and Figure 5 As shown, a maintenance port 613 is provided on the front side of the wiring cavity 61, and a maintenance cover 62 is provided on the maintenance port 613. The maintenance cover 62 is detachably connected to the maintenance port 613. When the wiring harness inside the wiring cavity 61 needs to be inspected, the maintenance cover 62 can be opened from the outside and inspected through the maintenance port 613.

[0067] The arrangement of the wiring cavity 61 in this embodiment not only utilizes the narrow space between the two motor housings 2 and the electronic control housing 1 to centrally connect the wiring harnesses, but also facilitates maintenance and troubleshooting, reducing maintenance difficulty and workload.

[0068] Preferably, if Figure 4-Figure 5 As shown, the edges of the electric control box opening 611 are on the same plane, and the electric control box opening 611 is fitted to the bottom surface of the electric control housing 1 and sealed with sealant, thereby achieving sealing between the electric control housing 1 and the wiring cavity 61.

[0069] Preferably, if Figure 3 As shown, the motor box opening 612 is roughly the same shape as the motor wiring port 231, and the edges are all on the same plane. After pasting, it is sealed with sealant to achieve the sealing of the interior of the reducer housing 6 and the motor housing 2 and the wiring cavity 61, preventing the oil in the reducer housing 6 from entering the wiring cavity 61 and the motor housing 2.

[0070] Furthermore, the reducer housing 6 includes a first cavity and a second cavity, the first cavity and the second cavity respectively correspond to a motor housing 2, a reducer is installed in each of the first cavity and the second cavity, and each reducer corresponds to a motor 10.

[0071] Furthermore, it also includes an electronically controlled cooling circuit 3 and a motor cooling circuit 4. The electronically controlled cooling circuit 3 includes a first electronically controlled cooling circuit and a second electronically controlled cooling circuit. The motor cooling circuit 4 includes a first motor cooling circuit and a second motor cooling circuit. The first electronically controlled cooling circuit and the second electronically controlled cooling circuit are both arranged in the electronically controlled housing 1. The first motor cooling circuit and the second motor cooling circuit are respectively arranged in two motor housings 2. The first electronically controlled cooling circuit is connected to the first motor cooling circuit, and the second electronically controlled cooling circuit is connected to the second motor cooling circuit.

[0072] Specifically, Figure 13 As shown, there are two electronic control cooling circuits 3, arranged symmetrically on both sides; there are two motor cooling circuits 4, also arranged symmetrically on both sides. Both electronic control cooling circuits 3 are located within a single electronic control housing 1, while the two motor cooling circuits 4 are located within two motor housings 2, respectively. The electronic control cooling circuits 3 and motor cooling circuits 4 on the same side are connected.

[0073] Since the electronic control cooling circuit 3 and the motor cooling circuit 4 are both arranged inside the shell, no external pipes are required for connection, making the overall structure compact and occupying little space. It also reduces the heat exchange loss of the external pipes, shortens the path of the cooling circuit, and improves the cooling efficiency.

[0074] In this embodiment, each motor is provided with a motor cooling circuit, and the two motor cooling circuits operate independently, so the cooling efficiency is higher and the cooling effect is better.

[0075] Further, if Figure 13As shown, it also includes a cooling main pipeline 5, which is arranged in the electronic control housing 1 and is connected to the inlet of the first electronic control cooling circuit and the second electronic control cooling circuit respectively. Figure 8 and Figure 13 As shown, the cooling main pipeline 5 includes an access pipe 51 and a branch pipe 52. The access pipe 51 is used to connect to an external cooling source. The access pipe 51 is connected to the branch pipe 52, and the branch pipe 52 is respectively connected to the inlet of the first electronically controlled cooling circuit and the second electronically controlled cooling circuit.

[0076] Specifically, Figure 8 As shown, the inlet of the access pipe 51 is opened on the outer side of the electronic control housing 1 , and the coolant enters from the access pipe 51 and flows into the branch pipe 52 .

[0077] like Figure 13 As shown, the branch pipe 52 is perpendicular to the access pipe 51 and extends horizontally through the left and right sides of the electronic control housing 1. The middle portion of the branch pipe 52 connects to the access pipe 51, and then connects to the inlets of the first and second electronic control cooling circuits on the left and right sides, respectively. Both ends of the branch pipe 52 extend through the left and right sides of the electronic control housing 1 and are sealed to facilitate drilling of the branch pipe 52.

[0078] Further, if Figure 8 As shown, the electronic control housing 1 includes a cover plate 11 and a bottom shell 12 .

[0079] like Figure 12 and Figure 13 As shown, the first electronically controlled cooling circuit and the second electronically controlled cooling circuit both include an input pipe 31, a cooling groove 32 and an output pipe 33. The two input pipes 31 are connected to the branch pipe 52. The input pipe 31 and the output pipe 33 are formed inside the bottom plate of the bottom shell 12. The cooling groove 32 is opened on the inner side surface of the bottom plate, and the two cooling grooves 32 are arranged side by side.

[0080] Specifically, Figure 13 As shown, the inlet pipe 31 is communicated with the branch pipe 52 in a direction perpendicular to the branch pipe 52 .

[0081] like Figure 11 As shown, two input pipes 31 are drilled from the side wall of the bottom shell 12 into the interior of the bottom shell 12. When in use, the outer holes of the input pipes 31 are blocked. This arrangement of the input pipes 31 is also convenient for processing.

[0082] like Figure 12 As shown, the cooling groove 32 is opened on the inner side surface of the bottom plate of the bottom shell 12, and the input pipe 31 is connected to one side of the cooling groove 32. After the coolant flows into the cooling groove 32, it cools the power module inserted into the cooling groove 32, and then flows out from the output pipe 33 connected to the other side of the cooling groove 32. Figure 12The two cooling slots 32 are arranged side by side to cool the two power modules arranged in the electronic control housing 1 respectively. The first electronic control cooling circuit and the second electronic control cooling circuit do not interfere with each other.

[0083] Preferably, if Figure 6 As shown, the cover plate 11 of the electronic control housing 1 includes three layers, the upper and lower layers are metal layers 111, and the damping material layer 112 is filled between the two metal layers 111. The damping material layer 112 can effectively reduce the electronic control radiation noise and improve the NVH performance.

[0084] Preferably, if Figure 4 As shown, a power module 20 is installed in the electronic control housing 1. A plurality of heat sinks are provided on one side of the power module 20. The heat sinks are inserted into the cooling grooves 32. The power module 20 and the edges of the cooling grooves 32 are sealed by sealing rings.

[0085] To facilitate the representation of connections between cooling circuits, Figure 13 It actually represents the entity of the coolant in the electronic control cooling circuit 3 and the motor cooling circuit 4. Figure 13 The middle cooling slot 32 is actually the shape of the coolant flowing around the plurality of heat sinks in the cooling slot 32 .

[0086] Further, if Figure 10 As shown, the top surface of the main shell 22 of the motor housing 2 is further provided with a first mounting column 221. Figure 11 A first mounting hole 121 is provided at the bottom edge of the bottom shell 12 of the central electronic control housing 1 , and the first mounting column 221 is connected to the first mounting hole 121 in the longitudinal direction by bolts or screws.

[0087] like Figure 10 As shown, a second mounting column 63 is provided on the top of the reducer housing 6. Figure 11 The bottom surface of the bottom shell 12 of the central electronic control housing 1 is further provided with a second mounting hole 122 , and the second mounting column 63 is connected to the second mounting hole 122 in the transverse direction by bolts or screws.

[0088] like Figure 7 As shown, the electronic control housing 1 is installed with the motor housing 2 and the reducer housing 6 by cooperating with the two sets of mounting columns and the mounting holes.

[0089] Further, if Figure 12 As shown, a plurality of hexagonal reinforcing ribs 13 are provided on the inner side surface of the bottom plate of the electronic control housing 1 .

[0090] Specifically, Figure 12 As shown, the hexagonal reinforcement ribs 13 are arranged on the upper part, the middle part and between the two cooling grooves 32 of the inner side surface of the bottom plate. The hexagonal reinforcement ribs 13 can improve the rigidity and strength of the electronic control housing 1.

[0091] Further, if Figure 12 As shown, the hexagonal reinforcement ribs 13 and the cooling grooves 32 are connected by the slash reinforcement ribs 15, and the two work together to further improve the rigidity and strength of the electronic control housing 1. Compared with a single honeycomb structure, the process is simpler.

[0092] Further, if Figure 13 As shown, the first motor cooling circuit and the second motor cooling circuit both include a liquid inlet 41, a spiral cooling channel 42 and a liquid outlet 43. The liquid inlet 41 is connected to the output pipe 33, the spiral cooling channel 42 is arranged inside the main shell 22, and the liquid inlet 41 and the liquid outlet 43 are arranged on the outer wall of the main shell 22 and are connected to the spiral cooling channel 42.

[0093] Specifically, Figure 10 As shown, the liquid inlet 41 is provided with an opening along the longitudinal direction to enter the main shell 22, the spiral cooling channel 42 surrounds the circumference of the main shell 22 to form multiple circles of continuous channels, and the liquid outlet 43 is provided on the outer wall of the main shell 22, and the liquid outlet 43 is connected to an external coolant recovery device.

[0094] Further, if Figures 9-11 As shown, the outlet of the output pipe 33 is opened on the bottom surface of the bottom shell 12 , and the liquid inlet 41 is set on the top surface of the main shell 22 .

[0095] Because electronic control housing 1 is positioned above motor housing 2, the outlet of output pipe 33 aligns perfectly with liquid inlet 41. Output pipe 33 and liquid inlet 41 can be connected via threads and sealed with a rubber ring. No external piping is required between electronic control cooling circuit 3 and motor cooling circuit 4. All cooling circuits are located within electronic control housing 1 and motor housing 2, improving cooling efficiency while reducing space requirements.

[0096] In this embodiment, each motor is equipped with a motor cooling circuit, and the two motor cooling circuits operate independently, resulting in higher cooling efficiency and better cooling effects. Furthermore, both the motor cooling circuit and the electronic control cooling circuit are located within the motor housing 2 and the electronic control housing 1, eliminating the need for external cooling piping. This results in a compact structure, minimized space, and further improved cooling efficiency.

[0097] The above description is only the principle and preferred embodiment of the present invention. It should be noted that for those skilled in the art, several other variations can be made based on the principle of the present invention, which should also be considered as the scope of protection of the present invention.

Claims

1. An electric drive housing assembly, comprising an electric control housing, a motor housing and a reducer housing, characterized in that: The two motor housings are symmetrically arranged on both sides of the reducer housing, and the electronic control housing is arranged above the reducer housing and the motor housing. The motor housing includes a first end cover, a main housing and a second end cover. The main housing is cylindrical. The first end cover is arranged on one side of the main housing, and the second end cover is located on the other side of the main housing and is integrally formed with the main housing. The two second end covers are respectively arranged on both sides of the reducer housing; The second end cover is provided with a reducer bearing mounting position on one side facing the reducer housing, and a motor bearing mounting position on the other side facing the main housing. The area of the second end cover extending beyond the main housing is provided with an output shaft hole; The reducer housing is provided with a wiring cavity, which includes an input shaft area, an intermediate shaft area, and an output shaft area. The wiring cavity is located directly above the input shaft area of the reducer housing, between the two motor housings, and below the electronic control housing. The electronic control housing completely covers the input shaft area, the intermediate shaft area, and the output shaft area. The top surface of the wiring chamber is provided with an electric control box opening, and the two sides of the wiring chamber are each provided with a motor box opening; An electric control wiring port is provided above the input shaft area on the bottom surface of the electric control housing, and the electric control wiring port is connected to the opening of the electric control closing box; The second end cover is provided with a motor connection port, which is passed into the interior of the main housing and is connected to the motor box opening; The motor wiring harness passes through the motor wiring port along the axial direction and then enters the wiring cavity through the motor box opening; The wiring harness of the motor controller is led out from the electric control wiring port in the longitudinal direction and enters the wiring cavity through the opening of the electric control box; The wiring harness of the motor and the wiring harness of the motor controller are connected in the wiring cavity; The electric control cooling circuit further includes an electric control cooling circuit and a motor cooling circuit, the electric control cooling circuit includes a first electric control cooling circuit and a second electric control cooling circuit, the motor cooling circuit includes a first motor cooling circuit and a second motor cooling circuit, the first electric control cooling circuit and the second electric control cooling circuit are both arranged in an electric control housing, the first motor cooling circuit and the second motor cooling circuit are respectively arranged in two motor housings, the first electric control cooling circuit is in communication with the first motor cooling circuit, and the second electric control cooling circuit is in communication with the second motor cooling circuit; The electric control housing includes a cover plate and a bottom shell; The first and second electronically controlled cooling circuits each include an input pipe, a cooling trough, and an output pipe. The outlets of the two output pipes are located on the bottom surface of the bottom shell and on both sides of the electronic control wiring port. The cooling trough is located on the inner side surface of the bottom plate, and the two cooling troughs are arranged side by side. The first motor cooling circuit and the second motor cooling circuit both include a liquid inlet, a spiral cooling channel and a liquid outlet. The liquid inlet and the liquid outlet are arranged on the top surface of the main shell, the liquid outlet is located on the outside of the electronic control shell, the liquid inlet is connected to the output pipe, and the spiral cooling channel is arranged inside the main shell. The liquid inlet and the liquid outlet are connected to the spiral cooling channel.

2. The electric drive housing assembly according to claim 1, characterized in that: The electric control box opening and the bottom surface of the electric control housing are sealed by sealant.

3. The electric drive housing assembly according to claim 1, characterized in that: The motor box opening and the motor wiring port are sealed by sealant.

4. The electric drive housing assembly according to claim 1, characterized in that: The reducer housing includes a first cavity and a second cavity, and the first cavity and the second cavity respectively correspond to one of the motor housings.

5. The electric drive housing assembly according to claim 1, characterized in that: It also includes a cooling main pipeline, which is arranged in the electronic control housing and is connected to the inlets of the first electronic control cooling circuit and the second electronic control cooling circuit respectively. The cooling main pipeline includes an access pipe and a branch pipe. The access pipe is used to connect to an external cooling source. The access pipe is connected to the branch pipe, and the branch pipe is connected to the inlets of the first electronic control cooling circuit and the second electronic control cooling circuit respectively.

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